Alright, let's work through 6438 times 3594 step by step
6438 × 3594 = 3594 × (6438)
+ 3594 × 8 which equals 28752
+ 3594 × 30 producing 107820
+ 3594 × 400 yielding 1437600
+ 3594 × 6000 that is equal 21564000

= 23138172
